Apparatus for drying out molding-flasks.



No. 896,070. PATENTED AUG. 11, 1908;

' G. I. WILLIAMS.

APPARATUS FOR DRYING OUT MOLDING FLASKS.

APPLICATION FILED FBB.11, 1905.

ATTOR NEYS UNITED s r rEs PATENT jornrcs.

CHARLES I. WILLIAMS, OF UTICA, NEW YORK.

APPARATUS non DRYING our OLDING-Busts.

Specification of Letters Patent. Application filed February 11, 1905.Serial No. 245,268.

. j Patented Aug.11,'1908.

new apparatus for drying out the sand in molding flasks preparatory tocasting, whereby 1the usual drying oven maybe dispensed Wit I Incarrying out the invention, I provide an individual heat-producing unitcapable of beinginserted into a sand molding flask and I leave. it thereuntil the sand has been dried;

then I remove the unit and proceed with the usual method of casting.This heating unit may be an electric one, a. gas-burnin or agas-injecting device, a steam-heated evice, or any device which isadapted to produce heat locally within the interior of the mold, andwhich may be removed from it.

' In the accompanying drawings I have shown various forms ,of heatingunits adapted for use in carrying out this invention.

Figure 1 shows an electrical heating-device within a pipe molding flask,shown in half for purpose of illustration; Fig. 2 shows a plaingas-burning device; Fig. 3 shows a gas-injecting and burning means; Fig.4 shows a steam-heated device; Fig. 5 illustrates a method which may beused with pipe molds for drying out a number at a time.

I have illustrated my invention as applied to ipe molding flasks, anditis thus descri ed throughout my specification merely because myinvention is particularly applicable for that type of molding flask.

' In Fig. 1 the flask F is as usual lined with wet sand 2. It isgenerally placed on end in a casting pit after being dried in an oven.

may place it there before drying according to my present invention.Wherever it is, in the pit or outside, I insert a heat-producing unitinto the interior of the flask, being careful not todisturb the sandwhile thus inserting it. In this Fig. 1, the unit P consists of a coilof wire 0 ada ted to be heated by an I electric current. he coil ifsupported by a steam or vapor, and a hook it to enable the usual foundrycrane to handle. the unit.

In Fig. 2 the unit P consists of a cover support S provided with a yokeh and carrycover support S'provided with vents vfor ing on its undersidea number of b'ulners b supported on the pipe P which passes out of thecover and suppliessome hydrocarbon mixture to the burners,-- To preventthe flames from impinging directly upon the sand, I .may provide anenveloping cylinder C secured at its top to the support S and providedwith numerous openings 0 in its walls.

In Fig. 3 I have shown the heating unit P as an injector I, the flame ofwhich is caused to shoot through the cylindrical mold. If desired thisform of heating means may also be provided with a support S and it maycarry a cylindrical interior guard C as shown in dotted lines for thepurpose described in reference to Fig. 2.

In Fig. 4 I have shown a heatroducing unit P consisting of a hollow doule-walled drum D through which steam may be circu-. lat-ed through steampipes 19 p In Fig. 4 I have illustrated a number of molds m placed oneon another. It will be obvious that any one of the heating units beforedescribed may be placed within such superposed molds, and the method maythen be carried out for the number of molds instead of with a singlemold as described. The advantage ofthe single mold and'its individualheating unit is that I am enabled to place the flasks in their properposition on the floor of the castin pit, there drying them and not becompelle to again handle them before inserting the cores and casting.

I claim as my invention In combination with a sand molding flask, acover support having steam vents and a carrying hook, electric heatingcoils passing I therethrough and adapted to enter the interior of theflask, substantially as described.

In testimony whereof I have signed my name to this specification, in thepresence of two subsoribin witnesses.

HARLES I. WILLIAMS.

Witnesses: WILLIAM ROSENKRANZ, BURTON HrrcHoooK.

